Red Brasses and Leaded Red Brasses are copper alloys, containing 2-15% of zinc (Zn) as the major alloying element and up to 5% of tin (Sn) and up to 8% of lead (Pb) as additional alloying elements. Cast Red Brasses and cast Leaded Red Brasses (Ounce Metal, Valve Metal, Plumbing Goods Brass) are designated with the numbers from C83300 through C83999.

Cast Yellow brasses are copper alloys, containing 23-41% of zinc (Zn) as the major alloying element. Yellow brasses may contain up to 3% of lead (Pb) and up to 1.5% of tin (Sn) as additional alloying elements. Cast Yellow Brasses are designated with the numbers from C85000 through C85999.

Brasses containing up to 35% of zinc have mono-phase structure (α-phase).